I paid 280 new, and another 15 for the bracket, give me 200 shipped. This is the 200 watt that gets used on fire trucks, not the 150 on cop cars, this is LOUD. I do not have the wiring diagram, but it is very simple and can be DL'd from the Whelen site. The only thing I don't have is the mic hanger piece that you can get at any CB place for like 3 bucks. This also has the sirens and squeals so be careful not to get in trouble impersonating a cop.